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Designed for people who hold the pen with very little slant 14k 71 72 Extra Broad Stub-Parkers widest stub point.
Produces heavy lines on horizontal stroke, thin lines on vertical stroke 14k 70 Medium Stub-a heavier flat point for shaded writing and printing.
Hence a "47" marking on a 1930's pen indicate that the pen was produced in the fourth quarter of 1937, not 1947, which is a common misconception.
In the second quarter of 1938 this system was however changed to save production time, and a new date code, using a system of dots, was adopted.
I U (there are discrepancies between models) 62 Accountant-Produces very thin lines with a delicate touch. Everything on this website is copyrighted by law and can not be used without written permission from the author, Tony Fischier.In 1950 a new system for the date coding was introduced where the two digits only indicated the year, not the quarter hence "50" means made in 1950, this system was used in the US until 1955 and in Canada a few years longer.. It has been assumed that Parker began marking some of their pens on the trim or cap bands to allow for dating in 1970. And since the gold part of the microlayer can be as thin as about 0.003–0.3 micrometer, the amount of gold used in the process is incredibly low. Electroplating chemically adds a very thin layer of gold to the base material. The process involves physical vapor deposition of gold (PVD). According to Parker a microlaminated surface of 1.3 micrometer has a "service life" equivalent or exceeding that of a 10 micrometer gold plating.